Water treatment device and water treatment method

Abstract

A water treatment device includes: a dual-pipe structure unit including an outer pipe, an inner pipe provided in the outer pipe, and a prevention member provided between the outer pipe and the inner pipe; and a light source unit radiating ultraviolet light in the axial direction to irradiate water subject to treatment flowing in the inner pipe. The inner pipe includes an opposing end facing the light source unit across a gap and an inflow end positioned opposite to the opposing end. The outer pipe includes an outflow port provided on an outer circumferential surface of the outer pipe. The water subject to treatment flowing out of the inner pipe via the gap flows out from the outflow port.

Description

RELATED APPLICATION[0001]Priority is claimed to Japanese Patent Application No. 2016-212761, filed on Oct. 31, 2016, the entire content of which is incorporated herein by reference.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention relates to a water treatment device, and, more particularly, a technology of irradiating water subject to treatment with ultraviolet light.2. Description of the Related Art[0003]It is known that ultraviolet light has sterilization capability. Devices that radiate ultraviolet light are used for sterilization in medical and food processing fronts. Devices that sterilize water subject to treatment continuously by irradiating the water subject to treatment with ultraviolet light are also used. One example is a device adapted to radiate ultraviolet light in a direction perpendicular to the direction of flow of the water subject to treatment.[0004]In a configuration in which ultraviolet light is radiated in a direction perpendicular...

AI Technical Summary

Benefits of technology

The present invention is about a water treatment device that can enhance the efficiency of ultraviolet light irradiation on water. The device includes a dual-pipe structure consisting of an outer pipe, an inner pipe, and a prevention member. A light source unit produces ultraviolet light that irradiates the water subject to treatment flowing in the inner pipe. The water flows out of the inner pipe through an outflow port in the outer pipe. The inner and outer pipes have a constant width, which ensures a straight flow of the water and uniform treatment with ultraviolet light. The device also ensures a pressure loss not exceeding 15 kPa to ensure equal treatment for the entire water sample. This results in a more efficient water treatment process.

Problems solved by technology

It has therefore been impossible to radiate ultraviolet light efficiently.

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